Identification of Corrosion Products
1. _________
have following feature when they are corroded.
(A) Corrosion is usually indicated by
whitish powdery deposits with dulling surface on unpainted parts.
(B) The white powdery deposit may spread
beneath paint causing blistering of flaking.
(C)
The surface will appear motted or etched with pitting as the corrosion attack
advances.
(D) Swelling or bulging of skins, pulled or
popped rivets are often visual indications of corrosion.
Choose the right answer.
(1) Aluminum Alloys (2) Alloy and Carbon Steels (3) Corrosion Resistant Steels (4) Copper Alloys
2. Corrosion
of Alloy and Carbon Steels is indicated
by _____________.
(1) whitish powdery deposits with dulling
surface on unpainted parts.
(2) red rust deposits and pitting of the
affected surfaces.
(3) black pits or a uniform reddish brown
surface.
(4) white and grey powdery deposits and the deposits
are sometimes fluffy or granular.
(5) a blue-green salt deposit.
3. Corrosion
of Corrosion Resistant Steels is indicated
by _____________.
(1) whitish powdery deposits with dulling
surface on unpainted parts.
(2) red rust deposits and pitting of the
affected surfaces.
(3) black pits or a uniform reddish brown
surface.
(4) white and grey powdery deposits and the deposits
are sometimes fluffy or granular.
(5) a blue-green salt deposit.
4. Corrosion
of Magnesium Alloys is indicated by _____________.
(1) whitish powdery deposits with dulling
surface on unpainted parts.
(2) red rust deposits and pitting of the
affected surfaces.
(3) black pits or a uniform reddish brown
surface.
(4) white and grey powdery deposits and the deposits
are sometimes fluffy or granular.
(5) a blue-green salt deposit.
5. Corrosion
of Copper Alloys is indicated by _____________.
(1) whitish powdery deposits with dulling
surface on unpainted parts.
(2) red rust deposits and pitting of the
affected surfaces.
(3) black pits or a uniform reddish brown
surface.
(4) white and grey powdery deposits and the deposits
are sometimes fluffy or granular.
(5) a blue-green salt deposit.